Cementing machine



Feb. -17, 1942.

A. C. EEK

CEMENTING MACHINE Filed July 25, 1940 2 Sheets-Sheet l Feb. 17, 1942. A. c. EEK

GEMENTING MACHINE Filed July 23, 1940 2 Sheets-Sheet 2 Patented Feb. 17, 1942 GEM'ENTING DIACHINE Albin C. Eek, Webster Groves, Mo. assignor. to United Shoe Machinery Corporation, Borough of, Flemington, N. J., a corporation of New Jersey Application July 23, 1940, Serial No. 346,974

14-, Claims.

This invention relates to a machine for applying adhesive to parts of shoes and is directed particularly to an improvement therein to insure the application of adhesive to the entire area to be coated in spite of irregularities and variations in the thickness of the work.

The machine in which the improvement is embodied comprises essentially a pair of parallel rolls of considerable length yieldably held at a predeterminedspacing and between which the work is fed for the application of adhesive to one surface thereof, one of the rolls constituting an adhesive applying roll and the other a presser roll for holding the" work against the adhesive applying roll. While such an arrangement is satisfactory for coating fiat material of uniform thickness, nevertheless, if the work is thicker in one part than in another at any area oftreatment, the thicker portions will hold the rolls apart to such an extent that the presser roll does notbear upon the thin parts. As a result, the thin parts are not pressed against the adhesive applying roll and, consequently, do not acquire the necessary coating of adhesive. This condition may exist, for example, when an insole has been partially reinforced by securing thereto a fiberboard reinforcement which terminates just forward of the-shankin a skived or beveled edge, or it may exist when one or more edges of a single thickness of material have been skived or beveled.

It is an object of the present invention, therefore; to design a machine of the character referred to above capable of applying adhesive to the entire area of the work irrespective of any variations in its thickness.

The illustrated machine comprises an adhesive applying roll and a co-openating presser roll for holding the work against the surface of the adhesive applying roll and feeding it between the rolls, an important feature of the invention residing in the provision, in such a machine, of supplementary means projecting beyond the surface of the presser roll toward the surface of the applying roll for forcing the parts of' the work not firmly engaged by the presser roll against the surface of the adhesive applying roll to insure the application of adhesive thereto.

In order to more specifically set forth the nature of the invention, it will now be described with reference to the accompanying drawings, in which:

Fig. 1 is a side elevation of a portion of a coating machine, partly in section, embodying the improved device" behind the presser roll;

Fig. 2 is aperspective view of the device;

Fig. 3 is a rear view of. the device;

Fig. 4 is a fragmentary section taken on the line IV--IV of Fig. 1;

Fig. 5 shows an insole reinforced on one side and to the oppositeside of which adhesive is applied prior to the application of the metal shank: and a second reinforcing piece tohold the shank in place; and

Fig. 6 illustrates the use of fingers throughout the entire length of the presser roll and the action of the fingers on the skived edges of onepiece material.

The invention is shown as applied to a common type of cementing machine the construction ofwhich will notbe described in detail except in-so far asis necessary to a clear understanding of the present invention. It is sufficient to point out that the machine includes a pair of parallel co-operating rollsl0 and l2- (Fig. 1), the rolls being mounted at their endsin bearings N and I6; respectively. The bearing I 5 is formed integral with a frame 18, only apart of? which is shown, the frame [8 being; in turn, mounted on a base l9. The bearing I6 isformed on a subframe 20 pivotally supported at the upper end of a pedestal 2| projecting upwardly from the base" IS, the outer end of the subirame being yieldably supported to permit the lower or adhesive-applying roll H to yield" when the work ispassed between the rolls; To this end, studs 2-2 (only one of which is shown) are mounted on the base H! at opposite ends of the roll, the upper ends of the studs extending through bores 24 formed at the free end of the subi'rame Springs 26 are disposed axially of the studs, the upper ends of the springs bearing against the under side of the subframe 20 and the lower ends against nuts 28 threaded on the studs whereby the subframe is yieldably held in position. The tension in the springs 26: may be varied by-adjustment of the nuts 28. The lower ends of thestuds 22 extend through the frame 19- and are-locked in place by thumb screws 29. Adjusting nuts 3| are provided at the base of each stud which are arranged to change the heightwise position of the studs when the thumb screws 29 are backed off so that the adhesive applying roll may be moved to or from the roll feed type of tank (not shown). A work table 32 is mounted at the entrance side of the rolls, the table being mounted on the subframe 20 and having downwardly projecting flanges 34 running forward of the exit side of the rolls which serve partially to enclose the upper end portions of the adhesive applying roll. The table and flanges are removably fastened to the subframe by screws 36.

The invention as embodied in this machine is particularly adapted, as will appear hereinafter, to apply adhesive to one side of a partially reinforced insole of the type shown in Fig. 5. As illustrated, the insole is reinforced on one side along the heel and shank portions by a strip R and along the other side by a metal shank piece P and an overlying strip R. In accordance with the practice followed herein the reinforcement strip R is attached to one side of the insole by stapling and then the insole is passed through the machine described above for the application of adhesive to the opposite side. The inner end of the attached reinforcement R is scarfed or skived at r, as is customary (Fig. l), so that it merges into the insole at approximately the junction of the shank and forepart of the insole. When the insole is passed between the rolls of the machine in a direction transverse to its length, the upper or presser roll II] will not bear upon the scarfed or skived edge 7 since the rolls will be held apart by the double thickness of the sole and reinforcement, as clearly illustrated in Fig. 4. The absence of pressure on this area permits the insole to bend or buckle somewhat so that its bottom surface at that portion is not pressed firmly against the adhesive applying roll l2 and, consequently, very little or no adhesive is applied thereto. As a result, when the second reinforcing piece R, including the metal shank piece P, is disposed on the adhesive coated side of the insole, the stiff tabs 1 at the free end of the reinforcing piece R which straddle the end of the metal shank piece P will not be securely anchored and will pull away from theinsole and permit the metal shank piece P to shift out of position. It is necessary, therefore, to provide supplemental means for holding this portion of the insole against the adhesive applying roll I2 to assure a good coating of adhesive thereto, and

this is accomplished by a plurality of springpressed fingers 38 projecting beyond the periphery of the presser roll and adapted to press any portions of the insole not acted upon by the presser roll l against the adhesive coated roll l2, the fingers being constructed and arranged to lie in grooves 40 formed circumferentially of the presser roll III with their ends extending between the rolls from the entrance side thereof and terminating just beyond the bite of the rolls on the exit side thereof. The fingers 38 are curved to conform generally to the curvature of the roll l0 and are pivotally supported near their rear ends on a spindle 42 journaled at its ends in depending flanges 44 formed on a block 46. A plate 50 is fixed to the rear side of the block and projects vertically upward therefrom, providing means for securing the block to a depending flange 52 (Fig. 1) formed on the under side of the frame 18. To this end, the plate 50 and the flange 52 are provided with corresponding apertures 56 and 58 through which screws 54 are passed, the ends of the screws being threaded into a plate 60 which rests against the inside of the flange 52.-

In order to permit adjustment of the fingers to and from the adhesive applying roll, means is provided for tilting the fingers about the spindle 42. To this end, the fingers are extended rearwardly and upwardly of the spindle, the upper ends 62 of the fingers terminating adjacent the bottom edge of the plate 50 with their inner sides abutting a wedge 64. The wedge 64 is disposed in a slot 66 formed transversely of the block 46 along the rear side thereof and is moved therein by a screw 68 threaded transversely through the block, the screw having a circumferentially grooved hub 10 adjacent its head ll adapted rotatably to receive a yoke 12 formed at one end of the wedge 64. The upper ends 62 of the fingers are yieldably held against the wedge 64 by leaf springs 14 extending from a plate 15 attached to the back of the plate 50 by screws 16. To stiffen the leaf springs 14, a second set of leaf springs 18 extending from a plate 71 are superimposed on the springs 14, the second set being stiffer than the first set. Movement of the wedge 64 transversely of the ends of the fingers in one direction tilts the fingers about the spindle 42 in a clockwise direction, as seen in Fig. 1, whereby the work engaging ends thereof are moved into the grooves 40 of the presser roll 10 away from the surface of the adhesive applying roll I2, while movement in the other direction permits the fingers to be tilted in a counterclockwise direction by the leaf springs whereby the work engaging ends of the fingers are moved from the grooves toward the adhesive applying roll. A guard 19 formed integral with a pair of extensions projecting downwardly from th plate 60 runs along the back of the fingers 38 close to the entering side of the rolls and the top surface of the table 32, thereby preventing the operator from accidentally pushing his fingers between the rolls.

When there is no work between the rolls, the fingers 38 may touch the surface of the adhesive applying roll, or at least come so close to its surface as to pick up a small amount of adhesive. It has been found that the adhesive picked up by the fingers is not spread over the top surface of the work subsequently introduced due to the fact that as the leading edge of the work is pushed beneath the fingers it strips what little adhesive there may be from the under side of the fingers, pushing it ahead so that the fingers are cleaned. This adhesive at the edge of the work is not harmful and will occur only when the first piece is introduced since a continuous succession of pieces will hold the fingers out of contact with the adhesive and the adhesive applying roll.

Sometimes small quantities of adhesive are accidentally smeared or spilled on the presser roll and if not promptly removed would be applied to the top surface of the work, thereby soiling it. To insure against this, a stripper plate having fingers 82 arranged to engage the surface of the ridges between the grooves 40 is adjustably mounted upon the frame IS. The plate 80 is provided with a yoke-shaped end 84 adapted to engage a groove 96 formed in th neck of a screw 88, the screw being threaded into the frame l8 whereby the stripper plate may be moved to and from the surface of the presser roll. A cover plate is fixed to the frame [8 above the presser roll 10 and plate 80 to enclose the same, the plate being removably secured by a hand screw 92.

In operation, the insole is grasped by the forepart, and the back part and shank are passed laterally, that is, from side to side, between the rolls (Fig. 4 The double thickness produced by the sole S and the reinforcement R holds the rolls apart so that the presser roll does not bear against the beveled or skived portion 7' of the reinforcement R. This portion r is engaged, however, by the spring-pressed fingers 38 which force the sole against the adhesive applying roll, thereby insuring an adequate coating of adhesive to that portion of the insoleopposite the portion 1.

While in the machine described the fingers are confined to one end of the presser roll, this is not intended as restricting the invention since it is entirely within the scope of the invention to employ fingers throughout the entire length of the roll, as shown by way of illustration in Fig. 6. Furthermore, the showing of an insole of the nature described is only one example of the capacity of this machine, as the machinev is adapted to apply adhesive to any piece of work W which is of unequal thickness in different areas, a common example of which is a single thickness sheet material skived 01' beveled along one or more edges.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine for applying adhesive to a shoe part having thin portions, a pair of co-opcrating feed rolls spaced so that their surfaces do not touch, means for supplying adhesive to the surface of one of said rolls, and means projecting beyond the surface of the other of said rolls toward the surface of the adhesive coated roll but not touching the same, said means being structurally independent of said other roll and adapted to force the thin portions of the shoe part against the surface of the adhesive coated roll.

2. In a machine for applying adhesive to a shoe part having thin portions, a pair of cooperating feed rolls spaced so that their surfaces do not touch, means for supplying adhesive to the surface of one of said rolls, and yieldable means projecting beyond the surface of the other of said rolls toward the surface of the adhesive coated roll but not touching the same, said means being structurally independent of said other roll and adapted to force the thin portions of the shoe part against the adhesive coated roll.

3. In a machine for applying adhesive to a shoe part having thin portions, a pair of co-operating feed rolls spaced so that their surfaces do not touch, means for supplying adhesive to the surface of one of said rolls, and a plurality of independent members projecting beyond the surface of the other of said rolls toward the surface of the adhesive coated roll, said members being structurally independent of said other roll and arranged to act individually to force the thin portions of the shoe part against the adhesive coated roll.

4. In a machine for applying adhesive to a shoe part having thin parts, a pair of co-operating feed rolls, means for supplying adhesive to the surface of one of said rolls, the other of said rolls holding said shoe part against the adhesive applying roll, means projecting beyond the surface of the other of said rolls toward the surface of the adhesive coated roll, and means for moving said projecting means to or from the surface of the adhesive coated roll, said projecting means being adapted to force the thin portions of the shoe part against the adhesive coated roll.

5. In a machine for applying adhesive to a shoe part having skived portions, a pair of cooperating feed rolls, means for supplying adhesive to the surface of one of said rolls, the other of said rolls being adapted to press the sho part against the adhesive coated roll, means projecting beyond the surface of the other of said rolls toward the surface of the adhesive coated roll for pressing the skived portions of the shoe part against the surface of the adhesive coated roll, means for yieldably holding said projecting means beyond the surface of the second-named roll, and means for withdrawing the projecting means from the surface of the adhesive coated roll.

6. In a machine for applying adhesive to a shoe part having skived portions, a pair of cooperating feed rolls, means for supplying adhesive tothe surface of one of said rolls, the other of said rolls being adapted to press the shoepart against the adhesive coated roll, a plurality of members projecting beyond the surface of the presser roll toward the surface of the adhesive coated roll, said members being adapted to press the skived portions against the surface of the adhesive coated roll, springs for urging said members toward the surface of the adhesive coated roll, and means for withdrawing said members from the surface of the adhesive coated roll.

7. In a machine for applying adhesive to a shoe part, a pair of co-operating feed rolls, means for supplying adhesive to the surface of one of said rolls, a plurality of members projecting beyond the surface of the other of said rolls toward the surface of the adhesive coated roll, means for urging said members toward the surface of the adhesive coated roll, and a wedge for withdrawing said members from the surface of the adhesive coated roll.

8. In a machine for applying adhesive to a shoe part, a pair of co-operating feed rolls, means for supplying adhesive to the surface of one of said rolls, means projecting beyond the surface of the other of said rolls toward the surface of the adhesive coated roll, said means being independent of said second-named roll, and means for moving said projecting means to or from the surface of the adhesive coated roll.

9. In a machine for applying adhesive to a shoe part, a pair of co-operating feed rolls, means for supplying adhesive to the surface of one of said rolls, circumferential grooves in the other of said rolls, and a plurality of fingers arranged to lie in said grooves between said rolls, said fingers being adapted to project beyond the grooves so that their outer surfaces lie in advance of said second-named roll.

10. In a machine for applying adhesive to a shoe part, a pair of co-operating feed rolls spaced so that their surfaces do not touch, means for supplying adhesive to the surface of one of said rolls, circumferential grooves in the other of said rolls, a plurality of fingers arranged to occupy said grooves between said rolls, springs for urging said fingers toward the adhesive coated roll, and means for limiting the movement of said fingers toward said adhesive coated roll.

11. In a machine for applying adhesive to a shoe part, a pair of co-operating feed rolls spaced so that their surfaces do not touch, means for supplying adhesive to the surface of one of said rolls, a plurality of fingers arranged to extend between the feed rolls, means for supporting the fingers, and individual means co-operating with each finger to yieldably urge it toward the adhesive coated roll to force that portion of the work it bears upon against the adhesive coated roll,

12. In a machine for applying adhesive to a shoe part, a pair of co -operating feed rolls, means for supplying adhesive to the surface of one of said rolls, circumferential grooves in the other of said rolls, a plurality of fingers arranged to occupy said grooves between said rolls, means for urging said fingers toward the adhesive coated roll, and means for limiting the movement of said fingers toward said adhesive coated roll, said limiting means comprising a Wedge engaging said fingers and adapted to move said fingers away from the adhesive coated roll.

13. In a machine for applying adhesive to a shoe part, a pair of co-operating feed rolls, means for supplying adhesive to the surface of one of said rolls, grooves in the other of said rolls, a spindle parallel to the axes of said rolls, a plurality of fingers pivotally mounted on said spindle with their ends extending between said rolls in said grooves from the entrance side thereof, and means for tilting said fingers on said spindle to move the ends of the said fingers to or from the surface of the adhesive coated roll.

14. In a machine for applying adhesive to a shoe part, a pair of co-operating-feed rolls, means for supplying adhesive to the surface of one of said rolls, grooves in the other of said rolls, a spindle, a plurality of fingers pivoted between their ends on said spindle with their lower ends extending between said rolls and with their upper ends abutting a wedge, said wedge being operable to tilt said fingers about said spindle in one direction, and springs arranged to engage the upper ends of said fingers to urge the fingers to turn in the other direction.

ALBIN C. EEK. 

